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It is a healthy coding practice to keep each argument separate when
executing system calls, i.e. quote each variable separately instead of
relying on whitespace to indicate argument separation.
Quoting shell-inside-shell is tricky to do right, and gets trickier when
the wrapper demands unusually complex quoting.
su_monkeysphere_user() expands arguments using "$*" which (unlike "$@")
collapses all arguments into a single string, and therefore require
"risky" arguments (e.g. ones containing variables that may contain space
or other unusual characters) to be dual-quoted for them to not wreak
havoc at the inside shell.
This patch improves arguments passed to su_monkeysphere_user() by first
single-quoting and then double-quoting arguments containing variables.
NB! Dynamic arguments are only double-quoted ( "$@" ) which looks safe
but effectively is a noop (quoting is lost at wrapper!).
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It is a healthy coding practice to keep each argument separate when
executing system calls, i.e. quote each variable separately instead of
relying on whitespace to indicate argument separation.
This patch improves argument passing like this:
a) Each argument is passed individually (not all as a single string)
b) Arguments containing no variables are not quoted
c) Dynamic arguments are double-quoted ( "$@" )
Due to su_monkeysphere_user() expanding arguments using "$*" (not "$@")
arguments are mostly¹ coollapsed into single strings, and this change is
therefore only cosmetic.
It does improve clarity, however. Also, it eases switching to safer
quoted arguments in the future.
¹As sole excepion ma/update_users line 82 has $STRICT_MODES dual-quoted.
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and mh (closes MS #2288)
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This rework removes any assumption that monkeysphere-host is just
managing a single host key, or that the keys are used specifically for
ssh. The UI is exactly backwards compatible except that hostnames
('example.com') must be replaced by full service names
('ssh://example.com'). This incarnation passes the old tests with
those changes only.
There are a couple of things that still need to be done:
- need to see if a transition script is needed (some local file names
have changed)
- need to fill in check_service_name function to verify that a
specified service name fits the expected format.
- update diagnostics appropriately
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The monkeysphere group is now determined from the system "groups"
command, and then MONKEYSPHERE_GROUP is explicitly set from this, and
then used when setting group ownership.
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is more similar, and so that they can read keys from stdin instead of
just from a file. Also fix the permissions on the tempdir in
publish_key.
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missing
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MHTMPDIR, since it's not needed.
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for functions that prompt for confirmation. Also fix publish_key
function (NOT TESTED).
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- fix some references to old function names
- move fingerprint_server_key to be fingerprint_host_key
- update diagnostic scripts
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Makefile as well)
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